Research on the Strategy of Pd Atomic-Level Dispersion Driven by Multi-Metal Synergistic Effects and Its Catalytic Oxidation Performance
DOI:
https://doi.org/10.53469/wjimt.2025.08(05).21Keywords:
Precious metal, Catalyst dispersion, Metal doping, Hydrogen catalytic oxidationAbstract
In this study, Pd-Ce@Al2O3 and Pd-Ce-Cu(1:1)@Al2O3 binary and ternary metal catalysts were successfully prepared by the non-polar solvent displacement method, and single-metal Pd@Al2O3 was simultaneously prepared as a comparison system. The effects of the introduction of co-catalysts such as Ce and Cu on the dispersion and particle size distribution of Pd noble metal were systematically investigated by high-resolution transmission electron microscopy (HR-TEM) combined with energy dispersive X-ray spectroscopy (EDS). It was found that the introduction of CeO2 significantly improved the dispersion of Pd species through the strong metal-support interaction (SMSI effect), and the co-doping of Cu further optimized the electronic structure of the active sites, resulting in the ternary catalyst showing the best low-temperature catalytic performance. This study provides a new component regulation strategy and theoretical basis for the design of efficient Pd noble metal catalysts.
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